Only about 1 in 5 people have a chin dimple. An evolutionary biologist unpacks the genetics — and the deeper mystery of why ...

Smile dimples aren't caused by a dominant gene — a biologist explains the muscle quirk behind them, and two surprising body parts that work the same way.

Add Yahoo as a preferred source to see more of our stories on Google. Image depics a young women with dimples on both cheeks, smiling in a field In some cultures, dimples are seen as a sign of beauty ...

Only 20 to 30 percent of the world's population has dimples, and the trait is genetic. While most people with dimples have two, a rare few have just one.

Dimples are small indentations that appear on the cheeks, usually when a person smiles. They are often considered attractive and are associated with youthfulness and charm. Dimples are a result of a ...